Why dont you try to uninstall the VCOM,PRELOADER AND MTK USB DRIVERS using usbdeveiw and manually reinstall it.
I make use of this Rom we are talking about to Flash an X509 2gb 32gb successfully and it was from Hovatek Download Section so,i believe you the right Rom from Hova
Dont be too rush because you will not get things done like that. More attention on your PC and Phone to communicate should be your next step.